With support for IMS-ready HTTP and SIP applications on a single platform, WebSphere IMS Connector, together with WebSphere Application Server, can enable truly converged IMS applications to be built and deployed on a single service execution platform. This can help customers and business partners reduce the complexity and cost of their IMS solutions.

IMS Session Control (ISC) interface that enables standards-based connectivity to Call/Session Control Functions (CSCF) in the IMS control plane.

Diameter stack and interfaces that support subscriber management and charging functions in accordance with IMS standards

The ISC interface in WebSphere IMS Connector can enable session control, supporting communications between the applications running on WebSphere Application Server and the different CSCFs of the IMS control plane. It allows SIP parameters, including the IMS specific private headers, to be presented to the applications.

The bi-directional ISC interface support in WebSphere IMS Connector can also help maximize application flexibility by allowing for applications to be deployed in the roles of originating, terminating, and back-to-back user agents.

The diameter stack and interfaces in WebSphere IMS Connector provide easy-to-use connectivity to subscriber management and billing systems. They include a standard Sh interface for subscriber profile management and a standard Rf interface for off-line charging, as defined by 3GPP standards.

Through the Sh interface, IMS service plane applications can reliably manage, with security, subscriber profiles from and to the Home Subscriber Server (HSS) in the service provider's environment. With the support for asynchronous notifications, the application can react to real time subscriber profile changes.

Through the Rf off-line charging interface, IMS service plane applications can securely and reliably support post-paid business models for service usage.

As a binary protocol, the standardized diameter protocol and interfaces are complex. WebSphere IMS Connector can help reduce this complexity and simplify the job of an IMS application developer by providing easy-to-use Web services application programming interfaces (APIs) for the diameter functions. These simple Web services abstractions hide the complexities of interfacing with the diameter elements and can also act as component APIs for service orchestration and choreography in a SOA deployment.

IBM actively engages with Network Equipment Providers (NEPs) around interoperability of the WebSphere IMS Connector with IMS core network elements provided by the NEPs. IBM also helps to enable Business Partner applications from NEPs and independent software vendors on the flexible WebSphere software based IMS application platform.

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